Re: [PATCH 10/24] rcu/tree: add rcutree.rcu_min_cached_objs description

Paul E. McKenney
2020-05-01T22:25:26Z

On Tue, Apr 28, 2020 at 10:58:49PM +0200, Uladzislau Rezki (Sony) wrote:
> Document the rcutree.rcu_min_cached_objs sysfs kernel parameter.
>
> Signed-off-by: Uladzislau Rezki (Sony) <urezki@gmail.com>

Could you please combine this wtih the patch that created this sysfs
parameter?

Thanx, Paul

> ---
> Documentation/admin-guide/kernel-parameters.txt | 8 ++++++++
> 1 file changed, 8 insertions(+)
>
> diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt
> index 828ff975fbc6..b2b7022374af 100644
> --- a/Documentation/admin-guide/kernel-parameters.txt
> +++ b/Documentation/admin-guide/kernel-parameters.txt
> @@ -3977,6 +3977,14 @@
> latencies, which will choose a value aligned
> with the appropriate hardware boundaries.
>
> + rcutree.rcu_min_cached_objs= [KNL]
> + Minimum number of objects which are cached and
> + maintained per one CPU. Object size is equal
> + to PAGE_SIZE. The cache allows to reduce the
> + pressure to page allocator, also it makes the
> + whole algorithm to behave better in low memory
> + condition.
> +
> rcutree.jiffies_till_first_fqs= [KNL]
> Set delay from grace-period initialization to
> first attempt to force quiescent states.
> --
> 2.20.1
>